Device beneficial to orientation of ultrahigh-toughness concrete fibers

Abstract

The utility model discloses a device beneficial to orientation of ultrahigh-toughness concrete fibers, which relates to the technical field of orientation of ultrahigh-toughness concrete fibers and comprises a belt conveyor, a plurality of flexible tooth combs and a plurality of scrapers are mounted on a transmission belt of the belt conveyor, and the flexible tooth combs and the scrapers are arranged on the transmission belt. The flexible tooth combs and the scrapers are alternately distributed in the length direction of a transmission belt of the belt conveyor, the length direction of the flexible tooth combs and the scrapers is perpendicular to the transmission direction of the belt conveyor, and a baffle is arranged at one end of the belt conveyor and is of an arc-shaped structure. According to the utility model, the flexible comb and the scraper are driven by the belt conveyor to move so as to carry out thin-layer trowelling on the ultra-high toughness concrete, so that the ultra-high toughness concrete trowelling machine can still operate normally even if the fluidity of the concrete is low, and the aims of achieving a more ideal directional arrangement effect of ultra-high toughness concrete fibers and reducing manual operation are fulfilled.

Description

Technical Field

[0001] The utility model relates to the technical field of ultra-high toughness concrete fiber orientation, in particular to a device for facilitating the orientation of ultra-high toughness concrete fibers. Background Technique

[0002] In recent years, with the rapid development of China's transportation industry, bridge construction has been continuously developing towards large-span directions, which has attracted extensive attention to the research and application of composite bridge deck structures on steel bridges. At present, the main girder structure of large-span bridges mainly adopts orthotropic steel bridge decks. However, with the increasingly high service conditions and complex service environments of bridges, the design of orthotropic steel bridge deck composite systems faces severe challenges. For this reason, the research team led by Professor Shao Xudong of Hunan University has developed a steel-ultra-high toughness concrete (STC) lightweight composite bridge deck structure. To ensure that the concrete has sufficient toughness and durability, steel fibers are incorporated into the concrete. Steel-ultra-high toughness concrete has ultra-high strength, toughness and durability, and its ultimate tensile strain and deformation resistance ability are much higher than those of ordinary concrete. However, in actual construction, steel fibers are often unevenly dispersed, and their spatial distribution in the concrete matrix is mainly affected by factors such as raw material properties, paste fluidity, pouring process, vibration method, and formwork wall effect. Only the steel fibers that are basically consistent with the direction of the tensile stress can play an effective strengthening effect, delay the generation and expansion of cracks, and thus improve the strength and durability of the concrete. The role of the steel fibers perpendicular to the tensile stress direction is minimal. Therefore, improving the dispersion and orientation of steel fibers not only helps to improve the mechanical properties, but also can save materials, reduce engineering costs, improve the structural durability and thus extend the service life.

[0003] The fiber arrangement direction is affected by the flow pattern of the mixture, rheological properties, pouring method, wall effect, external electromagnetic field, etc. At present, the main methods for fiber orientation are the "flow induction method" and the "magnetic field induction method". Among them, the "flow induction method" is mainly related to the rheological characteristics of the concrete paste and the flow direction during the pouring process. This method is mainly applicable to concrete with good fluidity. For concrete with poor fluidity, it is difficult to effectively achieve the oriented arrangement of fibers, and the bearing capacity of the formed specimens is poor; while the "magnetic field induction method" is to use magnetism to achieve the oriented arrangement of magnetically conductive fibers such as steel fibers. However, this method also has an increased resistance to the rotation of fibers when the magnetic field acts when the fluidity of the concrete paste is low. Therefore, in summary, the orientation effects of these two methods are not ideal when the concrete fluidity is low.

[0004] Therefore, there is an urgent need in the art for a device for facilitating the orientation of ultra-high toughness concrete fibers to solve the above problems. Content of the Utility Model

[0005] The purpose of the present utility model is to provide a device that facilitates the orientation of ultra-high toughness concrete fibers, so as to solve the problems existing in the above-mentioned prior art, that is, even when the fluidity of the concrete is low, fiber orientation can still be achieved for it.

[0006] To achieve the above object, the present utility model provides the following solutions:

[0007] The present utility model discloses a device that facilitates the orientation of ultra-high toughness concrete fibers, including a belt conveyor. A plurality of flexible tooth combs and a plurality of scrapers are installed on the transmission belt of the belt conveyor. The flexible tooth combs and the scrapers are alternately distributed along the length direction of the transmission belt of the belt conveyor. The length directions of the flexible tooth combs and the scrapers are perpendicular to the transmission direction of the belt conveyor. One end of the belt conveyor is provided with a baffle, and the baffle is of an arc-shaped structure.

[0008] Preferably, the flexible tooth comb includes a fixed gasket. The length direction of the fixed gasket is perpendicular to the transmission direction of the belt conveyor. A plurality of rubber rods are fixedly arranged at intervals on the fixed gasket.

[0009] Preferably, a plurality of fixed nuts are fixedly arranged at intervals on the fixed gasket, and each fixed nut is connected to one of the rubber rods.

[0010] Preferably, the cross-sectional shape of the scraper is fan-shaped.

[0011] Preferably, a main support structure is respectively fixed at the lower ends of the four corners of the frame of the belt conveyor.

[0012] Preferably, both ends of the baffle are respectively connected to the two main support structures through connecting rods.

[0013] Preferably, the main support structure includes a main support connecting member, a main support telescopic rod, a main support base, and a main support universal wheel that are arranged in sequence from top to bottom.

[0014] Preferably, an auxiliary support structure is respectively fixed at the middle positions on both sides of the frame of the belt conveyor.

[0015] Preferably, the auxiliary support structure includes an auxiliary support connecting member, an auxiliary support telescopic rod, and an auxiliary support base that are arranged in sequence from top to bottom.

[0016] The present utility model has achieved the following technical effects compared with the prior art:

[0017] The utility model realizes reciprocating work through the transmission of a belt conveyor, and uses the flexible tooth comb and the scraper fixed on the transmission belt to work in a single cycle, and cooperates with the thin-layer pouring technology to realize the directional arrangement of fibers in ultra-high toughness concrete. Since the working principle of the utility model is a physical smoothing method, it can be used for both fiber concrete with poor fluidity and non-magnetic fiber concrete, and can effectively improve the bearing capacity of concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Structural schematic diagram of the device for facilitating the directional arrangement of ultra-high toughness concrete fibers in an embodiment of the present utility model;

[0020] Figure 2 Structural schematic diagram of the flexible tooth comb in the device for facilitating the directional arrangement of ultra-high toughness concrete fibers in an embodiment of the present utility model;

[0021] Figure 3 Structural schematic diagram of the scraper in the device for facilitating the directional arrangement of ultra-high toughness concrete fibers in an embodiment of the present utility model;

[0022] Figure 4 Structural schematic diagram of the baffle in the device for facilitating the directional arrangement of ultra-high toughness concrete fibers in an embodiment of the present utility model;

[0023] Figure 5 Structural schematic diagram of the main support structure in the device for facilitating the directional arrangement of ultra-high toughness concrete fibers in an embodiment of the present utility model;

[0024] Figure 6 Schematic diagram of the auxiliary support structure in an extended state in the device for facilitating the directional arrangement of ultra-high toughness concrete fibers in an embodiment of the present utility model;

[0025] Figure 7 Schematic diagram of the auxiliary support structure in a contracted state in the device for facilitating the directional arrangement of ultra-high toughness concrete fibers in an embodiment of the present utility model;

[0026] In the figure: 1 - drive motor; 2 - belt conveyor; 31 - rubber rod; 32 - fixing nut; 33 - fixing gasket; 4 - scraper; 51 - baffle; 52 - connecting rod; 61 - main support connecting piece; 62 - main support telescopic rod; 63 - main support base; 64 - main support universal wheel; 71 - auxiliary support connecting piece; 72 - control switch; 73 - auxiliary support telescopic rod; 74 - auxiliary support base. Detailed implementation manners

[0027] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0028] The purpose of the present utility model is to provide a device that facilitates the orientation of ultra-high toughness concrete fibers, so as to solve the problems existing in the above-mentioned prior art, that is, even when the fluidity of the concrete is low, the fiber orientation can still be achieved for it.

[0029] In order to make the above objects, features, and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0030] As Figures 1 - 7 shown, this embodiment provides a device that facilitates the orientation of ultra-high toughness concrete fibers, including a belt conveyor 2. The belt conveyor 2 is a common existing conveying device, which includes a frame, on which a driving roller and a driven roller are provided. A transmission belt is sleeved between the driving roller and the driven roller, and one end of the driving roller is connected to a driving motor 1. The driving motor 1 is used to drive the driving roller to rotate, thereby driving the transmission belt to run. A plurality of flexible tooth combs and a plurality of scrapers 4 are installed on the transmission belt of the belt conveyor 2, and each flexible tooth comb and each scraper 4 are alternately distributed along the length direction of the transmission belt of the belt conveyor 2. It should be noted that the length directions of the flexible tooth combs and the scrapers 4 are perpendicular to the transmission direction of the belt conveyor 2, so as to orient the fibers in the ultra-high toughness concrete. One end of the belt conveyor 2 is provided with a baffle 51. The baffle 51 is of an arc-shaped structure. Since the ultra-high toughness concrete brought out by the belt conveyor 2 when driving the scraper 4 and the flexible tooth comb to work may fall onto the transmission belt, the baffle 51 can scrape off the ultra-high toughness concrete adhering to the transmission belt and make it return to the pouring area again.

[0031] In actual work, after the concrete in the working area is poured, the whole device is moved above the operation area, and the driving motor 1 is started to operate the device. During the operation, the flexible tooth combs and the scrapers 4 on the transmission belt reciprocally move in a cycle to align the fibers in the concrete, so that the fibers in the concrete are arranged along the movement direction of the transmission belt. After the fibers in this layer of concrete have been smoothed and aligned in a cycle for many times, the operation of the belt conveyor 2 is stopped. After the concrete in the next working area is poured, the belt conveyor 2 is moved to the next working area and the above operation is repeated until all the operation areas are completed.

[0032] In this embodiment, as Figure 2 shown, the flexible tooth comb includes a fixing gasket 33, and the fixing gasket 33 can be installed on the conveyor belt by means of bonding or bolts. The length direction of the fixing gasket 33 is perpendicular to the transmission direction of the belt conveyor 2, and a plurality of relatively soft rubber rods 31 are fixedly spaced on the fixing gasket 33, so as to enable the fiber orientation of the concrete.

[0033] In this embodiment, in order to fix the rubber rod 31, a plurality of fixing nuts 32 are fixedly spaced on the fixing gasket 33, and the rubber rod 31 is provided with external threads corresponding to the fixing nuts 32, so that each fixing nut 32 can be threadedly connected to a corresponding rubber rod 31. The advantage of this connection method is that when the rubber rod 31 is damaged, it can be replaced by screwing it, making the disassembly and replacement process simpler and faster. In addition, for the sizes, the set numbers, and the set positions of the rubber rod 31 and the fixing nuts 32, those skilled in the art can adjust them according to actual needs, so they are not limited herein.

[0034] In this embodiment, as Figure 3 shown, the cross-sectional shape of the scraper 4 is a sector, specifically 1 / 4 of a circle.

[0035] In this embodiment, a main support structure is fixedly provided at the lower ends of the four corners of the frame of the belt conveyor 2, and the main support structure is used to support the belt conveyor 2 and its various structures thereon and to move the whole.

[0036] In this embodiment, as Figure 4 shown, a connecting rod 52 is provided at each end of the baffle 51, and the two ends of the baffle 51 are respectively fixedly connected to two corresponding main support structures through the connecting rods 52, and the fixing method can be welding or screw connection.

[0037] In this embodiment, as Figure 5As shown in the figure, for the main support structure, the main support structure includes a main support connecting member 61, a main support telescopic rod 62, a main support base 63, and a main support universal wheel 64, which are arranged in sequence from top to bottom. The function of the main support connecting member 61 is to be fixedly connected to the frame part of the belt conveyor 2, and the connecting rod 52 on the baffle 51 is also fixed to the main support connecting member 61. The main support telescopic rod 62 includes, but is not limited to, existing hydraulic cylinders, air cylinders, or electric telescopic rods and other devices with linear telescopic functions. Through the telescopic action of the main support telescopic rod 62, the height of the belt conveyor 2 can be adjusted, and the technology of thin-layer pouring and leveling can be realized by the lifting of the main support telescopic rod 62 after the first layer of concrete is poured. And it should be noted here that the length of the main support telescopic rod 62 is not very long, and it can ensure that the flexible tooth comb and the scraper 4 on the transmission belt can contact the concrete below. As for the main support base 63 and the main support universal wheel 64, the two are fixed together by bolts or welding, and the main support universal wheel 64 is used to adjust the specific position of the belt conveyor 2 to facilitate its displacement.

[0038] In this embodiment, as Figures 6 - 7 shown, an auxiliary support structure is respectively fixed at the middle positions on both sides of the frame of the belt conveyor 2, and its function is to support the belt conveyor 2 in a fixed state.

[0039] In this embodiment, the auxiliary support structure is similar to the main support structure. The auxiliary support structure includes an auxiliary support connecting member 71, an auxiliary support telescopic rod 73, and an auxiliary support base 74, which are arranged in sequence from top to bottom. The auxiliary support connecting member 71 is used to be fixedly connected to both sides of the frame of the belt conveyor 2. The auxiliary support telescopic rod 73 includes, but is not limited to, existing hydraulic cylinders, air cylinders, or electric telescopic rods and other devices with linear telescopic functions. And a control switch 72 of the auxiliary support telescopic rod 73 is also provided on the auxiliary support connecting member 71 for controlling the telescopic of the auxiliary support connecting member 71. When the auxiliary support telescopic rod 73 is a hydraulic cylinder or an air cylinder, the control switch 72 can be a solenoid valve for controlling the liquid path or the gas path (a hydraulic cylinder or an air cylinder requires a solenoid valve to control its operation, which is prior art, so the connection relationship of its pipeline will not be further described here); when the auxiliary support telescopic rod 73 is an electric telescopic rod, the control switch 72 can be a control button supporting the electric telescopic rod. The auxiliary support base 74 is a conventional base structure. After the main support universal wheel 64 drives the belt conveyor 2 to move to the working area, extend the auxiliary support telescopic rod 73 so that the auxiliary support base 74 contacts the ground, thereby preventing the belt conveyor 2 from moving during the working process.

[0040] In this utility model, specific examples are used to elaborate on the principles and implementation manners of the utility model. The description of the above embodiments is only used to help understand the method and its core idea of the utility model; at the same time, for those of ordinary skill in the art, according to the idea of the utility model, there will be changes in the specific implementation manners and application scopes. To sum up, the content of this specification should not be construed as a limitation on the utility model.

Claims

1. A device for orienting ultra-high toughness concrete fibers, characterized in that: The invention comprises a belt conveyor (2), wherein a plurality of flexible tooth combs and a plurality of scrapers (4) are installed on the transmission belt of the belt conveyor (2), wherein the flexible tooth combs and the scrapers (4) are alternately distributed along the length direction of the transmission belt of the belt conveyor (2), and the length direction of the flexible tooth combs and the scrapers (4) is perpendicular to the transmission direction of the belt conveyor (2). A baffle (51) is provided at one end of the belt conveyor (2), and the baffle (51) is an arc-shaped structure.

2. The device for facilitating orientation of ultra-high toughness concrete fibers according to claim 1, characterized in that: The flexible tooth comb comprises a fixed gasket (33), the length direction of the fixed gasket (33) is perpendicular to the transmission direction of the belt conveyor (2), and a plurality of rubber rods (31) are fixed on the fixed gasket (33) at intervals.

3. The device for facilitating orientation of ultra-high toughness concrete fibers according to claim 2, characterized in that: A plurality of fixing nuts (32) are fixed at intervals on the fixing gasket (33), and each of the fixing nuts (32) is connected to one of the rubber rods (31).

4. The device for facilitating orientation of ultra-high toughness concrete fibers according to claim 1, characterized in that: The cross-sectional shape of the scraper (4) is fan-shaped.

5. The device for facilitating orientation of ultra-high toughness concrete fibers according to claim 1, characterized in that: A main supporting structure is fixed to the lower ends of the four corners of the frame of the belt conveyor (2).

6. The device for facilitating orientation of ultra-high toughness concrete fibers according to claim 5, characterized in that: Both ends of the baffle (51) are connected to the two main support structures via connecting rods (52) respectively.

7. The device for facilitating orientation of ultra-high toughness concrete fibers according to claim 5, characterized in that: The main support structure comprises a main support connecting piece (61), a main support telescopic rod (62), a main support base (63) and a main support universal wheel (64) which are arranged in sequence from top to bottom.

8. The device for facilitating orientation of ultra-high toughness concrete fibers according to claim 1, characterized in that: An auxiliary support structure is respectively fixed at the middle position on both sides of the frame of the belt conveyor (2).

9. The device for facilitating orientation of ultra-high toughness concrete fibers according to claim 8, characterized in that: The auxiliary support structure comprises an auxiliary support connecting piece (71), an auxiliary support telescopic rod (73) and an auxiliary support base (74) which are arranged in sequence from top to bottom.

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